package com.google.code.msgbooster.model;

import java.util.HashSet;
import java.util.Set;

import com.google.appengine.api.datastore.Key;
import com.google.code.msgbooster.core.VO;

public abstract class Meta extends VO {

	private static final long serialVersionUID = -8039267588469549869L;

	public abstract Key getKey();

	public Set<Key> addKey(Set<Key> keySet, Key key) {
		if (keySet == null)
			keySet = new HashSet<Key>();
		keySet.add(key);
		return keySet;
	}

}
